gunixvolume.c revision a4427bfff5d31499dc0b46fa3f734bc92f7d0dd5 
1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2
3/* GIO - GLib Input, Output and Streaming Library
4 *
5 * Copyright (C) 2006-2007 Red Hat, Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307, USA.
21 *
22 * Author: Alexander Larsson <alexl@redhat.com>
23 *         David Zeuthen <davidz@redhat.com>
24 */
25
26#include <config.h>
27
28#include <string.h>
29#include <sys/wait.h>
30#include <unistd.h>
31
32#include <glib.h>
33#include "gunixvolume.h"
34#include "gunixmount.h"
35#include "gthemedicon.h"
36#include "gvolumemonitor.h"
37#include "gsimpleasyncresult.h"
38#include "glibintl.h"
39
40#include "gioalias.h"
41
42struct _GUnixVolume {
43  GObject parent;
44
45  GVolumeMonitor *volume_monitor;
46  GUnixMount     *mount; /* owned by volume monitor */
47
48  char *device_path;
49  char *mount_path;
50  gboolean can_eject;
51
52  char *identifier;
53  char *identifier_type;
54
55  char *name;
56  GIcon *icon;
57};
58
59static void g_unix_volume_volume_iface_init (GVolumeIface *iface);
60
61#define g_unix_volume_get_type _g_unix_volume_get_type
62G_DEFINE_TYPE_WITH_CODE (GUnixVolume, g_unix_volume, G_TYPE_OBJECT,
63			 G_IMPLEMENT_INTERFACE (G_TYPE_VOLUME,
64						g_unix_volume_volume_iface_init))
65
66static void
67g_unix_volume_finalize (GObject *object)
68{
69  GUnixVolume *volume;
70
71  volume = G_UNIX_VOLUME (object);
72
73  if (volume->volume_monitor != NULL)
74    g_object_unref (volume->volume_monitor);
75
76  if (volume->mount)
77    _g_unix_mount_unset_volume (volume->mount, volume);
78
79  g_object_unref (volume->icon);
80  g_free (volume->name);
81  g_free (volume->mount_path);
82  g_free (volume->device_path);
83  g_free (volume->identifier);
84  g_free (volume->identifier_type);
85
86  G_OBJECT_CLASS (g_unix_volume_parent_class)->finalize (object);
87}
88
89static void
90g_unix_volume_class_init (GUnixVolumeClass *klass)
91{
92  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
93
94  gobject_class->finalize = g_unix_volume_finalize;
95}
96
97static void
98g_unix_volume_init (GUnixVolume *unix_volume)
99{
100}
101
102/**
103 * g_unix_volume_new:
104 * @volume_monitor: a #GVolumeMonitor.
105 * @mountpoint: a #GUnixMountPoint.
106 *
107 * Returns: a #GUnixVolume for the given #GUnixMountPoint.
108 **/
109GUnixVolume *
110_g_unix_volume_new (GVolumeMonitor  *volume_monitor,
111                    GUnixMountPoint *mountpoint)
112{
113  GUnixVolume *volume;
114
115  if (!(g_unix_mount_point_is_user_mountable (mountpoint) ||
116	g_str_has_prefix (g_unix_mount_point_get_device_path (mountpoint), "/vol/")) ||
117      g_unix_mount_point_is_loopback (mountpoint))
118    return NULL;
119
120  volume = g_object_new (G_TYPE_UNIX_VOLUME, NULL);
121  volume->volume_monitor = volume_monitor != NULL ? g_object_ref (volume_monitor) : NULL;
122  volume->mount_path = g_strdup (g_unix_mount_point_get_mount_path (mountpoint));
123  volume->device_path = g_strdup (g_unix_mount_point_get_device_path (mountpoint));
124  volume->can_eject = g_unix_mount_point_guess_can_eject (mountpoint);
125
126  volume->name = g_unix_mount_point_guess_name (mountpoint);
127  volume->icon = g_unix_mount_point_guess_icon (mountpoint);
128
129
130  if (strcmp (g_unix_mount_point_get_fs_type (mountpoint), "nfs") == 0)
131    {
132      volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_NFS_MOUNT);
133      volume->identifier = g_strdup (volume->device_path);
134    }
135  else if (g_str_has_prefix (volume->device_path, "LABEL="))
136    {
137      volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_LABEL);
138      volume->identifier = g_strdup (volume->device_path + 6);
139    }
140  else if (g_str_has_prefix (volume->device_path, "UUID="))
141    {
142      volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UUID);
143      volume->identifier = g_strdup (volume->device_path + 5);
144    }
145  else if (g_path_is_absolute (volume->device_path))
146    {
147      volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE);
148      volume->identifier = g_strdup (volume->device_path);
149    }
150
151  return volume;
152}
153
154/**
155 * g_unix_volume_disconnected:
156 * @volume:
157 *
158 **/
159void
160_g_unix_volume_disconnected (GUnixVolume *volume)
161{
162  if (volume->mount)
163    {
164      _g_unix_mount_unset_volume (volume->mount, volume);
165      volume->mount = NULL;
166    }
167}
168
169/**
170 * g_unix_volume_set_mount:
171 * @volume:
172 * @mount:
173 *
174 **/
175void
176_g_unix_volume_set_mount (GUnixVolume  *volume,
177                          GUnixMount *mount)
178{
179  if (volume->mount == mount)
180    return;
181
182  if (volume->mount)
183    _g_unix_mount_unset_volume (volume->mount, volume);
184
185  volume->mount = mount;
186
187  /* TODO: Emit changed in idle to avoid locking issues */
188  g_signal_emit_by_name (volume, "changed");
189  if (volume->volume_monitor != NULL)
190    g_signal_emit_by_name (volume->volume_monitor, "volume_changed", volume);
191}
192
193/**
194 * g_unix_volume_unset_mount:
195 * @volume:
196 * @mount:
197 *
198 **/
199void
200_g_unix_volume_unset_mount (GUnixVolume  *volume,
201                            GUnixMount *mount)
202{
203  if (volume->mount == mount)
204    {
205      volume->mount = NULL;
206      /* TODO: Emit changed in idle to avoid locking issues */
207      g_signal_emit_by_name (volume, "changed");
208      if (volume->volume_monitor != NULL)
209        g_signal_emit_by_name (volume->volume_monitor, "volume_changed", volume);
210    }
211}
212
213static GIcon *
214g_unix_volume_get_icon (GVolume *volume)
215{
216  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
217  return g_object_ref (unix_volume->icon);
218}
219
220static char *
221g_unix_volume_get_name (GVolume *volume)
222{
223  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
224  return g_strdup (unix_volume->name);
225}
226
227static char *
228g_unix_volume_get_uuid (GVolume *volume)
229{
230  return NULL;
231}
232
233static gboolean
234g_unix_volume_can_mount (GVolume *volume)
235{
236  return TRUE;
237}
238
239static gboolean
240g_unix_volume_can_eject (GVolume *volume)
241{
242  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
243  return unix_volume->can_eject;
244}
245
246static gboolean
247g_unix_volume_should_automount (GVolume *volume)
248{
249  /* We automount all local volumes because we don't even
250     make the internal stuff visible */
251  return TRUE;
252}
253
254static GDrive *
255g_unix_volume_get_drive (GVolume *volume)
256{
257  return NULL;
258}
259
260static GMount *
261g_unix_volume_get_mount (GVolume *volume)
262{
263  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
264
265  if (unix_volume->mount != NULL)
266    return g_object_ref (unix_volume->mount);
267
268  return NULL;
269}
270
271
272gboolean
273_g_unix_volume_has_mount_path (GUnixVolume *volume,
274                                         const char  *mount_path)
275{
276  return strcmp (volume->mount_path, mount_path) == 0;
277}
278
279
280typedef struct {
281  GUnixVolume *unix_volume;
282  GAsyncReadyCallback callback;
283  gpointer user_data;
284  GCancellable *cancellable;
285  int error_fd;
286  GIOChannel *error_channel;
287  guint error_channel_source_id;
288  GString *error_string;
289} EjectMountOp;
290
291static void
292eject_mount_cb (GPid pid, gint status, gpointer user_data)
293{
294  EjectMountOp *data = user_data;
295  GSimpleAsyncResult *simple;
296
297  if (WEXITSTATUS (status) != 0)
298    {
299      GError *error;
300      error = g_error_new_literal (G_IO_ERROR,
301                                   G_IO_ERROR_FAILED,
302                                   data->error_string->str);
303      simple = g_simple_async_result_new_from_error (G_OBJECT (data->unix_volume),
304                                                     data->callback,
305                                                     data->user_data,
306                                                     error);
307      g_error_free (error);
308    }
309  else
310    {
311      simple = g_simple_async_result_new (G_OBJECT (data->unix_volume),
312                                          data->callback,
313                                          data->user_data,
314                                          NULL);
315    }
316
317  g_simple_async_result_complete (simple);
318  g_object_unref (simple);
319
320  g_source_remove (data->error_channel_source_id);
321  g_io_channel_unref (data->error_channel);
322  g_string_free (data->error_string, TRUE);
323  close (data->error_fd);
324  g_spawn_close_pid (pid);
325  g_free (data);
326}
327
328static gboolean
329eject_mount_read_error (GIOChannel *channel,
330                  GIOCondition condition,
331                  gpointer user_data)
332{
333  char *str;
334  gsize str_len;
335  EjectMountOp *data = user_data;
336
337  g_io_channel_read_to_end (channel, &str, &str_len, NULL);
338  g_string_append (data->error_string, str);
339  g_free (str);
340  return TRUE;
341}
342
343static void
344eject_mount_do (GVolume             *volume,
345                GCancellable        *cancellable,
346                GAsyncReadyCallback  callback,
347                gpointer             user_data,
348                char               **argv)
349{
350  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
351  EjectMountOp *data;
352  GPid child_pid;
353  GError *error;
354
355  data = g_new0 (EjectMountOp, 1);
356  data->unix_volume = unix_volume;
357  data->callback = callback;
358  data->user_data = user_data;
359  data->cancellable = cancellable;
360
361  error = NULL;
362  if (!g_spawn_async_with_pipes (NULL,         /* working dir */
363                                 argv,
364                                 NULL,         /* envp */
365                                 G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
366                                 NULL,         /* child_setup */
367                                 NULL,         /* user_data for child_setup */
368                                 &child_pid,
369                                 NULL,           /* standard_input */
370                                 NULL,           /* standard_output */
371                                 &(data->error_fd),
372                                 &error)) {
373    GSimpleAsyncResult *simple;
374    simple = g_simple_async_result_new_from_error (G_OBJECT (data->unix_volume),
375                                                   data->callback,
376                                                   data->user_data,
377                                                   error);
378    g_simple_async_result_complete (simple);
379    g_object_unref (simple);
380    g_error_free (error);
381    g_free (data);
382    return;
383  }
384  data->error_string = g_string_new ("");
385  data->error_channel = g_io_channel_unix_new (data->error_fd);
386  data->error_channel_source_id = g_io_add_watch (data->error_channel, G_IO_IN, eject_mount_read_error, data);
387  g_child_watch_add (child_pid, eject_mount_cb, data);
388}
389
390
391static void
392g_unix_volume_mount (GVolume    *volume,
393                     GMountMountFlags    flags,
394                     GMountOperation     *mount_operation,
395                     GCancellable        *cancellable,
396                     GAsyncReadyCallback  callback,
397                     gpointer             user_data)
398{
399  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
400  char *argv[] = {"mount", NULL, NULL};
401
402  if (unix_volume->mount_path != NULL)
403    argv[1] = unix_volume->mount_path;
404  else
405    argv[1] = unix_volume->device_path;
406
407  eject_mount_do (volume, cancellable, callback, user_data, argv);
408}
409
410static gboolean
411g_unix_volume_mount_finish (GVolume        *volume,
412                           GAsyncResult  *result,
413                           GError       **error)
414{
415  return TRUE;
416}
417
418static void
419g_unix_volume_eject (GVolume    *volume,
420                     GMountUnmountFlags   flags,
421                     GCancellable        *cancellable,
422                     GAsyncReadyCallback  callback,
423                     gpointer             user_data)
424{
425  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
426  char *argv[] = {"eject", NULL, NULL};
427
428  argv[1] = unix_volume->device_path;
429
430  eject_mount_do (volume, cancellable, callback, user_data, argv);
431}
432
433static gboolean
434g_unix_volume_eject_finish (GVolume        *volume,
435                            GAsyncResult  *result,
436                            GError       **error)
437{
438  return TRUE;
439}
440
441static char *
442g_unix_volume_get_identifier (GVolume              *volume,
443                              const char          *kind)
444{
445  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
446
447  if (strcmp (kind, unix_volume->identifier_type) == 0)
448    return g_strdup (unix_volume->identifier);
449  return NULL;
450}
451
452static char **
453g_unix_volume_enumerate_identifiers (GVolume *volume)
454{
455  GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
456  char **res;
457
458  if (unix_volume->identifier_type)
459    {
460      res = g_new (char *, 2);
461      res[0] = g_strdup (unix_volume->identifier_type);
462      res[1] = NULL;
463    }
464  else
465    {
466      res = g_new (char *, 1);
467      res[0] = NULL;
468    }
469
470  return res;
471}
472
473static void
474g_unix_volume_volume_iface_init (GVolumeIface *iface)
475{
476  iface->get_name = g_unix_volume_get_name;
477  iface->get_icon = g_unix_volume_get_icon;
478  iface->get_uuid = g_unix_volume_get_uuid;
479  iface->get_drive = g_unix_volume_get_drive;
480  iface->get_mount = g_unix_volume_get_mount;
481  iface->can_mount = g_unix_volume_can_mount;
482  iface->can_eject = g_unix_volume_can_eject;
483  iface->should_automount = g_unix_volume_should_automount;
484  iface->mount_fn = g_unix_volume_mount;
485  iface->mount_finish = g_unix_volume_mount_finish;
486  iface->eject = g_unix_volume_eject;
487  iface->eject_finish = g_unix_volume_eject_finish;
488  iface->get_identifier = g_unix_volume_get_identifier;
489  iface->enumerate_identifiers = g_unix_volume_enumerate_identifiers;
490}
491